Earlier quoted context omitted.
"The profits are not earned by U.S. Corporations; they're earned by alien corporations." These alien corporations are then owned by proxy by US corporations, THUS a violation of 26 U.S. Code § 7201. It isn't a "it feels bad" thing, this is just a felony.
The argument that these large corporation's lawyers are putting forward is that the taxes aren't imposed on them by the tax code because the US government only taxes money when it is brought in to the US, and therefore, they aren't evading taxes. Whether that's true or not is a task for the courts to decide, but considering that there is a long history of the US government not taxing overseas profit until it comes to…
Since these are felony allegations (criminal not civil) IRS investigators should sit a few of these CFOs down in a cement room and ask: "Does any of this money come back to the US?"
Then the CFO has a few options: 1) lie to a federal agent (not a good plan) 2) plead the 5th (not a good plan) 3) state to a federal officer that none of the money is used, transferred, or used to pay employees of said corporation by proxy.
I would assume these wouldn't go well at all.